What position of the cardiac vector at the peak of the R wav

What position of the cardiac vector at the peak of the R wave of an electrocardiogram gives the greatest sum of voltages for leads I, II, and III?

Solution

In fact if to say in degrees at +60 drgees of thecardiac vector gives the peak of the R wave of an electrocardiogram greatest sum of voltages for the leads.

leads: These are the bipolar standard leads which are used to record the ECG in the frontal plane.

LEAD - I : Potential difference between left arm and right arm (LA-RA)

LEAD - II : Potential difference between left leg and right arm (LL-RA)

LEAD - III : Potential difference between left leg and left arm (LL-LA)

In each of these lead positions the QRS of normal heart is such that the R - WAVE is positive. the LEAD - II produces the greatest R- wave potential.

LEAD II = LEAD I + LEAD III.